DE102007012113B4 - Compact sorption refrigeration device - Google Patents

Abstract

Compact sorption refrigeration device, comprising at least one adsorber-desorber unit with heat exchanger and sorption material, at least one condenser heat exchanger and at least one evaporator heat exchanger, said units are located in a common, vacuum-tight metallic outer housing, and with connection and connecting elements and pipe penetrations to hydraulic interconnection and operation,
characterized in that
a sandwich structure is provided, wherein the at least one adsorber-desorber unit is located in an inner or partial inner housing,
the condenser heat exchanger and the evaporator heat exchanger are arranged at a distance from each other and in their intermediate space, the inner housing is provided with adsorber desorber unit,
the separating surfaces of the inner housing directed towards the condenser heat exchanger and the evaporator heat exchanger have steam valves and a heat-insulating layer or plate is arranged in the region between the inner housing and the evaporator heat exchanger.

Description

The The invention relates to a compact sorption refrigeration device comprising at least an adsorber-desorber unit with heat exchanger and sorption material, at least one condenser heat exchanger and at least one evaporator heat exchanger, wherein these units located in a common, vacuum-tight metallic outer housing are, as well as with connecting and connecting means and pipe penetrations to hydraulic interconnection and operation according to the preamble of the claim 1.

Sorption heat pumps, in which ad / desorber heat exchangers are arranged together with an evaporator and a condenser in a common vacuum-tight container, provide according to the DE 199 02 695 A1 a known prior art.

The lesson after DE 102 30 075 A1 relates to a heat pump module for an absorption heat pump, consisting of an ad / desorber heat exchanger and an evaporator / condenser in a common sealed housing, wherein the ad / desorber heat exchanger can act either as an absorber or desorber and the evaporator / condenser Unit is optionally operable as an evaporator or condenser. Thus, for use in an absorption heat pump, two identical heat pump modules described above are necessary.

A method for controlling the output power of a cooling device with a plurality of heat exchangers is described in US Pat EP 0 731 324 A1 described. The cooling unit includes two ad / desorber heat exchangers, an evaporator and a condenser. In this construction, however, no compact housing arrangement is provided.

From the generic DE 102 17 443 B4 moreover, a solids sorption heat pump comprising an adsorber desorber unit with a heat exchanger and a solid sorbent material is previously known, this adsorber desorber unit being arranged in a common housing sealed to the environment together with a condenser-evaporator unit , The adsorber-desorber unit and the condenser-evaporator unit are separated in this prior art by an adsorptive-permeable element.

To according to DE 102 17 443 B4 To achieve a structure with a low heat capacity, the local adsorber-desorber unit comprises a heat-conducting receiving body, which is in heat-conducting connection with the heat exchanger. Accordingly, the receiving body fulfills two functions, namely on the one hand the heat transfer between the heat exchanger and the sorption material and on the other hand the production of a stable structure of the adsorber-desorber unit. With such a stable structure, it is possible to make the wall of the common housing is particularly thin, since this no longer needs to give the unit of the sorption heat pump additional stability, but only serves to seal the interior from the environment.

According to exemplary embodiment of the prior art DE 102 17 443 B4 the outer wall can be designed as a sheet metal casing, which is placed or supported from the outside on the adsorber-desorber unit or condenser-evaporator unit. To achieve a good insulation from the environment, the common housing can also be designed clamshell, wherein in the interior space between the inner and outer shell, a heat-insulating material is inserted. The common housing which can be removed from the known state of the art can, as already mentioned, consist of a thin sheet metal material which surrounds the individual elements. The mechanical stability of the sheet is ensured by supporting the edges of the heat exchanger in the area of pipe deflections. The adsorber-desorber unit and the condenser-evaporator unit are arranged one above the other and through the vapor-permeable element, for. B. realized in the form of a ceramic sponge, separated from each other. There is an evacuation nozzle on the housing. As a result, a negative pressure can be generated in the interior of the housing. Due to the negative pressure, the thin-walled sheet metal casing of the housing comes into contact with an intended receiving body, with the result that the forces generated under negative pressure lead to a stabilization of the entire arrangement.

With regard to the mode of action of a sorption heat pump and its operation in the individual phases is on the DE 102 17 443 B4 expressly referred to and pointed out.

Out The above object of the invention, a further developed compact sorption refrigeration device, comprising at least one adsorber-desorber unit with heat exchanger and sorbent material and condenser heat exchanger and evaporator heat exchanger indicate which over a very high performance including has a high efficiency and the above In addition, realized using a small space be possible, the operation of the institution to be created as possible trouble-free over a long service life is.

The solution The object of the invention is achieved by a compact sorption refrigeration device according to the feature combination of the patent claim 1, wherein the dependent claims at least expedient embodiments and represent further education.

It is therefore a compact Sorptionskälteeinrichtung comprising at least an adsorber-desorber unit with heat exchanger and sorption material, at least one condenser heat exchanger and at least one evaporator heat exchanger is assumed, wherein these units in a common, vacuum-tight, preferred metallic outer housing are located. Furthermore, on or in the housing Connecting and connecting elements as well as pipe penetrations provided for hydraulic interconnection and operation of the device.

According to the invention Sorptionskälteeinrichtung formed as a sandwich structure, wherein the at least one adsorber desorber unit in an inner casing or inner housing located.

Of the Condenser heat exchanger and the evaporator heat exchanger are spaced apart from each other and take in their space the inner casing with the adsorber desorber unit on.

The to the condenser heat exchanger and to the evaporator heat exchanger directed separating surfaces of the inner casing include steam valves.

in the Area between the inner housing and the evaporator heat exchanger is a thermal barrier coating or a thermal insulation board arranged, which in the region of the vapor passage, d. H. in the area the steam valves, recesses.

In a preferred embodiment are between the respective heat exchangers and the inner housing parts Profile material spacers provided. Leave such profile material spacers easily by punching and bending steps of metallic material manufacture or can as standard profiles in commercial Fashion related.

About the Dimensions of the profile material spacers are beyond the positions of the heat exchangers and their distance position can be determined.

In an embodiment According to the invention, the adsorber-desorber unit can be at least two adjacent heat exchangers having sorbent material, each in a chamber, d. H. separated from each other, located in the inner housing.

The Partitions of the inner casing have recesses, wherein in the recesses flutter valves are used. These flutter valves serve the controlled steam passage. The flutter valves are made of elastic valve material and gravity closed when there is no pressure difference. The valve material changes its position in terms of the savings then when a pressure difference between upper and Below the valve assembly is present.

The respective flutter valves arrive in the open state in abutment with a Aussparungsabdeckstreifen which height of the respective separation surface and the recess provided there is spaced. These cut-out covers can from their surface dimension side bigger or be formed equal to the dimension of the respective recess, so that protection of the flutter valve material is achieved.

The respective recesses can rectangular or square and have a longitudinal or transverse web, which shares the recess. The flutter valve is then at the respective Crossbar fixable.

The inner housing is executed partially closed, being its complete Encapsulation is achieved by corresponding sections of the outer housing.

at a further embodiment the invention is between the condenser heat exchanger and the evaporator heat exchanger a siphon-like condensate return provided.

These Includes siphon condensate return a jacket tube, one end of which merges into a pressure equalization pot. In the jacket tube is an open inner tube is located. The free end of the inner tube is over a flange with the condensate drain port of the condenser heat exchanger in Connection. Further tubular Connections are between the pressure equalization pot and the evaporator heat exchanger intended. The siphon condensate return is outside the sorption refrigeration device located and over vacuum-tight connection means with those inside the sorption refrigeration device arranged respective heat exchangers connected.

The Invention will be described below with reference to an embodiment and below With the help of figures closer explained become.

in this connection demonstrate:

1 an exploded view of the compact sorption refrigeration device according to the invention with sub-elements of the outer housing;

2 a representation of the Blecheinhausung for Sorptionskälteeinrichtung with elements of the inner housing, but without the in the 1 shown heat exchanger and

3 one with respect to the Blecheinhausung teilweggeschnitte representation of the sorption refrigeration device with siphon condensate return and steam valve (detail M) and the detail X regarding the arrangement of the condensate return and further detailed representations of this.

The Sorptionskälteeinrichtung shown in the figures goes from one Sandwich structure of their construction.

Specifically, there are two adjacent adsorber-desorber units 1 inside an inner casing. The inner housing consists of a lower separating plate formed as a separating surface 2 and an upper baffle 3 ,

Between the adsorber desorber units 1 is a partition wall 4 educated.

The condenser heat exchanger 5 is above the adsorber-desorber unit 1 and the evaporator heat exchanger 6 below the unit 1 located.

Between the lower separating plate 2 and the evaporator heat exchanger 6 is a thermal insulation board 7 located, which openings 8th which is essentially congruent with recesses in the lower baffle 2 are what steam valves 9 take up.

Between the respective heat exchangers and the inner housing parts are profile material spacers 10 provided, on the one hand ensure a defined position of the structural units of the sandwich structure and on the other to increase the stability.

A cover plate 11 , designed as a lower cover plate, encloses the evaporator heat exchanger 6 and represents an element of the outer housing.

An upper cover plate 12 encloses the condenser heat exchanger in an analogous manner 5 and also constitutes a part of the outer housing (see 2 ).

Other elements of the outer housing are slide-in sheets 13 on both sides of the evaporator heat exchanger 6 as well as slide-in sheets 14 on both sides of the condenser heat exchanger 5 ,

The inner housing for holding the adsorber-desorber unit 1 includes angled dividing sheet sides 15 that by side plates 16 the outer housing are covered.

Furthermore, there are slide-in sheets 17 for the adsorber-desorber unit 1 provided, which in this case represent an element of the outer and inner housing.

The Bumps between The individual sheets are designed as a lip seam and have the necessary tightness and mechanical stability.

The steam valves designed as flutter valves 9 should be under references to the representation after 3 links including detail M are explained in more detail.

In recesses in the lower and upper partitions 2 ; 3 is a crossbar 18 available. With the help of the crossbar 18 is an elastic flutter valve material 19 fixed.

Depending on the pressure difference below and above the respective separating plate 2 ; 3 Either the flutter valve material at the recess fitting (as shown in FIG 3 , Steam valve 9 closed) or opened at pressure difference (see illustration 3 , Detail M below).

Above the respective recess is a Aussparungsabdeckstreifen 20 arranged at a distance.

This respective Aussparungsabdeckstreifen 20 protects on the one hand the flutter valve material 19 and forms a height stop for the flutter valve material.

In one embodiment, the respective recess cover strip 20 by means of spacers by screws 21 on the crossbar 18 attached.

Furthermore, according to the illustration according to 3 a siphon condensate return 22 located outside the closed housing of the sorption refrigeration device.

This siphon condensate return 22 includes a closed bottom jacket tube 23 ,

At the upper end of the jacket tube 23 is a pressure equalization pot 24 (see detail V) available.

This pressure equalization pot 24 takes an inner tube 25 on.

The outer free end of the inner tube 25 is over a flange 26 with the condensate drain 27 connectable.

Furthermore, tubular compounds 28 and 29 present, on the one hand (connection 29 ) the pressure equalization towards the closed sorption refrigeration device and on the other hand ( 28 ) of the connection to the evaporator heat exchanger 6 serve.

1

Adsorber desorber unit

2

lower Divider

3

upper Divider

4

Baffle wall

5

Condenser heat exchanger

6

Evaporator heat exchanger

7

thermal insulation board

8th

opening

9

steam valve

10

spacer

11

lower cover sheet

12

upper cover sheet

13

insert plate Evaporator

14

insert plate capacitor

15

Divider pages

16

Page sheet

17

insert plate for adsorber desorber unit

18

crosspiece

19

Flutter valve material

20

flap

21

screw

22

Siphon condensate return

23

casing pipe

24

Pressure compensation pot

25

inner tube

26

flange

27

Drainage plug

28; 29

tubular connection

Claims (11)

Compact sorption refrigeration device, comprising at least one adsorber-desorber unit with heat exchanger and sorption material, at least one condenser heat exchanger and at least one evaporator heat exchanger, said units are located in a common, vacuum-tight metallic outer housing, and with connection and connecting elements and pipe penetrations to hydraulic interconnection and operation, characterized in that a sandwich structure is provided, wherein the at least one adsorber desorber unit is located in an inner or partial inner housing, the condenser heat exchanger and the evaporator heat exchanger are spaced from each other and in their space the Inner housing is provided with adsorber-desorber unit, which have to the condenser heat exchanger and the evaporator heat exchanger facing separation surfaces of the inner housing steam valves and in the region between the inner housing and the Ve steamer heat exchanger a thermal barrier coating or plate is arranged. Sorptionskälteeinrichtung according to claim 1, characterized in that between the respective heat exchangers and the inner housing parts profile material spacers are provided. Sorptionskälteeinrichtung according to claim 2, characterized in that on the dimensions of the profile material spacers the position of the heat exchangers can be fixed to each other. Sorptionskälteeinrichtung according to one of the preceding claims, characterized in that the adsorber-desorber unit at least two adjacent heat exchangers having sorbent material, each in a chamber in the inner housing are located. Sorptionskälteeinrichtung according to one of the preceding claims, characterized in that the dividing surfaces of the inner casing Have recesses, wherein in the recesses flutter valves are used as steam valves. Sorptionskälteeinrichtung according to claim 5, characterized in that the flutter valves in the open state come into abutment with a Aussparungsabdeckstreifen, which in height of the respective separation surface and the recess provided there is spaced. Sorptionskälteeinrichtung according to claim 5 or 6, characterized in that the respective recess rectangular or square and has a longitudinal or transverse web, which the recess divides, with the flutter valve material at the respective Bridge is fixed. Sorptionskälteeinrichtung according to one of the preceding claims, characterized in that the inner casing is executed partially closed, being its complete Encapsulation is realized by sections or parts of the outer housing. Sorptionskälteeinrichtung according to one or more of the preceding claims, characterized characterized in that between the condenser heat exchanger and the evaporator heat exchanger provided a siphon condensate return is. Sorptionskälteeinrichtung according to claim 9, characterized in that the siphon condensate return a Has jacket tube, one end of which merges into a pressure equalization pot, wherein in the jacket tube an inner tube is befindlich and the free end of Inner tube over a flange with the condensate outlet of the condenser heat exchanger is in communication, as well as other tubular connections between the pressure equalization pot and the inner housing and the evaporator heat exchanger are provided. Sorptionskälteeinrichtung according to claim 9 or 10, characterized in that the siphon condensate return outside the sorption refrigeration device located and over Vacuum-tight connection means with the inside of the refrigeration device arranged respective heat exchangers connected is.